Important Notices 2022年4月1日 CHSSL's Services from April 1st, 2022 (Update May 31) News More SystemMarch 10, 2025From 17:30 p.m. on March 13, request form is downSystemFebruary 4, 2025From 9:00 a.m. on Feb. 6, our website is downSystemOctober 30, 2024From 10:00 a.m. on Nov. 7, our website is downCloseJuly 22, 2024The CHSSL will be closed on Oct. 21-23.NewsMay 1, 2024Introducing CHSSL’s Digital Collections on JSTORNewsMarch 1, 2024Study Series No. 81 is availableSystemJanuary 25, 2024From 13:00 p.m. on Jan. 30, our website is down